Envelop.



PATLNTED JULY 7, 1908. D. & G. LA TREMOUILLE.

ENVELOP. APPLICATION FILED 11:12.14, 1907.

' cnrrnn sTATns rATanT DAVID LA TREMOUILLE AND GEORGE LA TREMOUILLE, OF OSWEGO, NEW YORK.

ENVELOP.

To all whom it may concern:

Be it known that we, DAVID LA 'lnEMoU- ILLE and GEORGE LA TREMOUILLE, citizens ot the United States, residing at Oswego, in the county of Oswego and State of N ew York, have invented certain and new uselul Improvements in Envelops, ot' which the following is a specification.

This invention relates to an improved envelop, especially designed as a container `lor transporting small articles through the mail, the object in view being to provide a simple, inexpensive, strong and durable envelop which is eXpansible to accommodate goods or articles varying in size and which when sealed will be held firmly and securely against contraction or collapse.

The preferred form of the invention is illustrated in the accompanying drawings, in which Figure l is a perspective view ol the completed envelop sealed ready for trz'msit. F ig. 2 is a similar view showing the envelop as it appears before sealing. Fig. 3 is avertical cross section through the sealed envelop. Fig. 4 is a plan view of the blank from which the envelop is made.

Referring to the drawings, the immoral l designate the improved envelop formed from the blank shown in Fig. 4, said envelop comprising front and back walls 2 and 3, a bottom wall 4L, end walls 5, a top wall and a sealing flap 7 integral with the `free edge of the top wall and gummed lor attachment to the rear wall, as shown in Fig. l, to seal the envelop.

The front and rear walls 2 and il are lormed with central longitudinal creases or caliening lines S to adapt the same to bulge or eirpand to increase the width ol the envelop at the center, while the end walls 5 are provided with similar creases or lilies E) l'or the saine purpose. The bottom wall flY is provided with a central longitudinal crease or weakening line l() to adapt it to l'old inwardly in thcllorm of a V between the iront and back walls. The end walls 5 are l'orlned by upturned Vflaps which are approximately or' double truncate triangular l'orm or have their side edges converging l'rom the center' toward the ends thereol', as shown in Fig. 4, thus increasing the width of said walls at the center to allow the Aliront and back wall to expand to a limited extent. The end walls may besecured to the lront and rear walls in any preferred manner, but as shown Specification of Letters Patent.

i the sides of which they conform.

Patented July '7, 1908.

Serial No 357,277.

the latter named walls are providedl with flanges 11 bent inwardly on the creases or weakening lines l2 and pasted or otherwise secured to the end walls, to the contour of The end walls are provided with vertical longitudinal creases or weakening lines 13 adapting them to fold inward in bellows fashion or in the lform of substantially triangular l'laps. By thus adapting the bottom and end walls to lfold in the manner described, the envelop may be collapsed in close compass lor storage or shipment and expanded vl'or use to provide a compartment having considerable storage space for the reception and transportation ol goods or articles through the mail; The top wall (i is provided with terminals, tabs or [laps 14 gummed on their inner faces and adapted to be turned down and fastened to the end wall5.

'l he mode ol constructing the envelop from the blank shown in Fig. il will be apparent, and it will be understood that after the envelop has been V[illed the top wall and sealing llap are turned over to close the mouth thereol' and the sealing llap gummed to the rear wall 3, after which the tabs 14k are moistened and gummed to the end walls 5. The tabs .lll will accordingly act as reinforces to stay the end walls 5 and hold the same lrom collapsing, thus enabling cornparatively delicate articles to be shipped with safety.

i Having thus described the invention, what is claimed as new, is

l. An envelop comprising a body formed ol front, rear, bottom and end walls, said bottom and end walls having central longitudin al creases or weakening lines adapting them to l'old inwardly, and the liront, rear and end walls being provided with similar transverse central creases or weakening lines and the end walls being ol` gradually increasing width toward the centerto adapt the body to collapse and expand with a greater degree ol out\\'ard extension at the center, and a to) wall integral with the l'ront wall and adapter to close the mouth ol' the envelop, said top wall being providedA with a gummed sealing llap adapted to be secured to the rear wall and with gummed end extensions adapted to be turned down and permanently secured to the outer surfaces of the end walls.

2. An envelop of double truncate triangular form in cross section, the same comprising a body formed ol a l'ront wall, a back wall,

a top Wall, asealing lap carried by the top Wall and gurnrned for attachment to the rear Wall, the end walls being of double truncate triangular formation and the front and rear Walls provided with securing flanges properly shaped for attachment to the side edges of the end Walls, said front, rear and end Walls being provided with central longitudinal creases and the end Walls with central transverse creases in line with the longitudinal creases of the front and rear Walls, and the top Wall being formed With gurnlned end extensions adapted to be turned down upon and perrnanently secured to the end Walls upon the sealing ofthe envelop to liold said Walls in eX- tended condition.

In testimony whereof We affix our signan tures in presence of tWo Witnesses.

DAVID LA TREMOUILLE. GEORGE LA TREMOUILLE.

Vitnesses:

HENRY D. DONAHUE. ORLIE A. SMITH. 

